And, this is what one USES a lot in applied math, which is the same thing as physics but with different notations.

同时我们也经常在应用数学里用到，跟物理的意义一样，只是记号不同。

youdao

At the end of the day, I wound up starting in Math and Physics at Harvard, finishing an Applied Math and Economics and doing business.

最后，我跑去哈佛学了数学和物理，念完了应用数学和经济，跑去经商了。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选